I cannot make this work:
use MooseX::Declare; class Foo { use Moose::Util::TypeConstraints; subtype 'NewType' => as 'Object'; method bar (NewType $arg) { } } I get the following error: 'NewType' could not be parsed to a type constraint - maybe you need to pre-declare the type with class_type at reader Parse::Method::Signatures::TypeConstraint::tc (defined at /home/yshtil/ lib/perl5/site_perl/5.14.1/Parse/Method/Signatures/TypeConstraint.pm line 20) line 7